Neuron Types

• • Carries messages from sensory receptors in the PNS to the CNS.
  • Not all sensory information reaches the brain. Some of it terminates at the spinal cord - allows reflex actions to occur without delay.


  Sensory neurons
• • Carries messages from the CNS to directly or indirectly control muscles.
  • When stimulated, these neurons carry motor (movement) information to the muscles.
  • Neurotransmitters bind to receptors on the muscle which causes the muscle to move when stimulated and relax when inhibited.


  Motor Neurons
• • Carry messages from one part of the CNS to another.
  • Most common type of neurons
  • Allow sensory and motor neurones to communicate with eachother.
  • Usually have shorter dendrites and axons than other neuron types.


  Relay Neurons